# CVE-2024-51492: Zusam vulnerable to stored XSS, allowing token theft via crafted SVG

> Attackers can steal long-lived session tokens via stored XSS in uploaded SVG files, leading to account takeover in Zusam forums.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 1 Nov 2024
- **Updated:** 1 Nov 2024
- **Also known as:** GHSA-96fx-5rqv-jfxh

## What is CVE-2024-51492?

CVE-2024-51492 is a high-severity cross-site scripting vulnerability in zusam, published on 1 Nov 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Zusam is a free and open-source way to self-host private forums. Prior to version 0.5.6, specially crafted SVG files uploaded to the service as images allow for unrestricted script execution on (raw) image load. With certain payloads, theft of the target user’s long-lived session token is possible. Note that Zusam, at the time of writing, uses a user’s static API key as a long-lived session token, and these terms can be used interchangeably on the platform. This session token/API key remains valid indefinitely, so long as the user doesn’t expressly request a new one via their Settings page. Version 0.5.6 fixes the cross-site scripting vulnerability.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2024-51492?


## How do I fix CVE-2024-51492?

No fix has been published for CVE-2024-51492 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-51492 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-51492 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-51492 and fix it if it is affected.

What it is: CVE-2024-51492 is a high-severity cross-site scripting vulnerability in zusam, published on 1 Nov 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-51492 exists.

Affected product: zusam. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2024-51492/ (Markdown: https://insights.sbomify.com/CVE-2024-51492/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-51492
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-51492
- OSV: https://osv.dev/vulnerability/CVE-2024-51492

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From sbomify Insights: https://insights.sbomify.com/CVE-2024-51492/
Summaries are generated and may contain mistakes; the official description above is the record.